Alt-BEAM Archive

Message #05874



To: beam@sgiblab.sgi.com
From: Dave Hrynkiw dave@solarbotics.com
Date: Fri, 27 Aug 1999 10:00:06 -0600
Subject: [alt-beam] Re: SOLAR CELLS?


At 01:06 PM 8/27/99 , Ivan patrick Codd wrote:
>Do any of you know of any place or company in the world i could
>get 3 volt solar cells, which output at least at 40 or 50
>mA.
>The cells would also have to be small (at biggest approx 11 cm x
>7 cm) and be light (less than 30 grammes) as i have to mount
>them on the robot.

If you need commecial quantities, try www.photontek.com. Let them know we
sent you, ok?

Thanks,
Dave
---------------------------------------------------------------
"Um, no - that's H,R,Y,N,K,I,W. No, not K,I,U,U, K,I,_W_. Yes,
that's right. Yes, I know it looks like "HOCKYRINK." Yup, only
2 vowels. Pronounciation? _SMITH_".
http://www.solarbotics.com



5875 Sat, 28 Aug 1999 00:19:16 +0200 [alt-beam] UJT/PUT as replacement for 1381? arno.jansen@superconsult.nl (Arno Jansen) I have just spent 4 hours to test the circuit of the photopopper I wnt to
make. Just a standard circuit, but without the 1381's. There aren't any here
in Holland. I am quite annoyed that it doesn't work yet, but it's quite
educative.

As I first thought the 1381 was there to deliver a more or less stable
voltage, I found out that it is there to swith the motor on to move to the
light, and once there, stay there and not drive further. We spent four hours
to find a solution to replace the 1381. And we came to the idea that it
might be a Uni Junction Transistor (UJT) or Programmable UJT (PUT). Is that
it? Am I right? If so, I just sleep in front of the electronics-shop tonight
and get a few UJT's tomorrow morning!!!

So, my question in short: is the 1381 a UJT, or is a UJT a good replacement
for a 1381? I like to think so, but I am not a pro, so maybe some of you
guy's can help me out here. Please......

Best,
Arno

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